Clamp for feed-cutter sharpeners



C. A. HOLM.

CLAMP FOR FEED CUTTER SHARPENERS.

APPLICATION man JAN. I0. 1910.

1,309,984. Patented July 15, 1919.

mvewbo'c 'w @QMKe a a 3M THE coLuMulA PLANOGRAPH 03., WASHINGTON, mc.

UNITED STATES PATENT OFFICE.

CHARLES A. HOLM, F TIG ERTON, WISCONSIN.

CLAMP FOR FEED-CUTTER SHABPENERS.

Application filed January 10, 1918. sea-1 11012113011" To all whom it may concern:

Be it known that I, CHARLES A. HoLM, a citizen of the United States, residing at Tigerton, in the county of Shawano and State of Wisconsin, have invented certain new and useful Improvements in Clamps for Feed-Cutter Sharpeners; and I do de clare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has for its object to provide an extremely simple and inexpensive, yet a highly eflicient and durable device for sharpenin the rotary cutters of feed or ensilage c oppers; and with this general object in view, the invention resides in the novel features of construction and unique combination of parts herein described and claimed and shown in the accompanying drawing wherein:

Figure 1. is a vertical transverse section of the sharpener applied to a feed chopper.

Fig. 2 is a top plan view with the cutter in section;

Fig. 3. is a perspective view of the sharpening stone; and

Fig. 4: is a perspective view of the stone clamping bars.

In the drawing above briefly described, the numeral 1. deslgnates the frame of a well known type of ensilage or feed choppers upon which a rotary cutter 2. is mounted, a transverse guard plate 3. being secured to said frame and located in front of said outter. In most instances I will utilize this guard plate as a support for the sharpening device, although other supporting means could well be used.

When plate 3. is employed to carry the sharpener, said plate is formed with openings 1. as shown, and these openings receive four supporting arms 5. which may well be formed of ordinary eye bolts. I have specified four arms 5. but more could be used if found desirable. In all cases, however, the inner ends of these arms will contact with th outer sides of a pair of spaced parallel stone clamping bars 6. which contact with opposite sides of an elongated sharpening stone 7. of suitable material,.

said stone preferably having four concave sharpening faces, any one of which may be used. At 8, the inner sides of the bars 6. are of convex formation for proper engage Specification of Letters Patent.

Patented July 15, 1919.

ment with two opposed concave sides of the stone as seen in Fig. 1.

For drawing the bars 6. tightly against the stone 7. and for securing the arms 5. to said bars, a pair of bolts 9. pass through the eyes 10. of said arms and through said bars, said bolts abutting the stone 7. to prevent possible movement of the latter between the plates ('3. in a direction away from the cutter knives 11., movement in the other direction between said plates being prevented by engagement of the concave faces of said stone with the convex portions of said bars.

For securing the arms 5. to the plate 3. or other support used, nuts 12. are threaded on said arms and either bear against the support or against yielding washers 13. interposed between them and said support. The washers 13. may be of rubber, or of spring metal and are preferably used as much better results are obtained when employing them.

The device is installed as seen in Fig. 1. so that the knives 11. will contact with the stone' 7. as the cutter 2. rotates, original setting of the device and any subsequent adjustments being made by the nuts 12. Whenever expedient, the stone 7. may be turned to expose a new grinding face, by simply loosening the bolts 9.

The device is simple and inexpensive and may therefore be manufactured and marketed at a small. cost and sold at a low price; yet it is efficient and durable.

Attention is directed to the fact that the bolts 9 clamp the bars 6 in contact with opposite sides of the elements 7, that said bolts also serve to attach the arms or eyebolts 5 to the device, and that said arms or eye-bolts are allowed pivotal movement around the bolts 9 to aline their free ends with the openings 4 when initially installin the device.

he construction shown is preferably followed but within the scope of the invention as claimed, minor changes may well be made.

I claim In a clamp, the combination with an element, of a pair of clamping bars positioned against opposite sides of said element and having their rear edges projecting beyond the same and formed with bolt holes, eyebolts whose eyes aline with said bolt holes and contact with the remote sides of said bars, clamping bolts passing through said In testimony whei'eoffl have. hereunto set bolt holes and eyes for clamping said bars my hand in the presence of two subscribing against said element, for securing said cyewitnesses.

bolts in'place, and for -=permittirig-1iv6ti1 --C-HARLES A. HOLM. 5 movement of said eye;bclt s, and nuts threaded on said eye-belts td coact there- F. Y. KING,

with in securing the entii e device in place. (FRANCES DOPSON.

Copies of this patent may be obtainfiflttor fi o oop gs qacil gykmressigg the Commissioner of Patents,

Washington, D. G. 

